The DS40 surge protectors are designed to be used in a multipolar configuration to protect single-phase, 3-phase or 3-phase+neutral AC networks, are used mainly for primary protection at the main electrical panel. They are sometimes associated with dedicated N/PE surge protector based on gas tube technology (DS40G).
2 possible configurations :
Common mode : CT1 configuration
Example:
DS42-280 single-phase (L+N) protect
DS44-400 3-phase+N protect
DS44-230 3-phase+N protect
Common and Differential mode : CT2 configuration
Example:
DS44-400/G 3-phase+N protect
The DS40 impulse discharge capability classifies this SPD as regular Type 2, useful in case of medium lightning density areas. IEC60364 standard requests Type 2 SPD at the entrance of installation if the keraunic level Nk > 25.
This SPD is based on high energy varistor equipped with thermal disconnector and failure indicator, to comply with standards. Version with a remote signaling for disconnection indication is also available (DS4*S).
The DS40 is available for a large range of AC voltages. The DS40 is DIN rail compatible and is built with a plug-in module (DSM40-xxx) and a fixed base, which allows an easy and fast maintenance.
ELECTRICAL PROPERTIES
MECHANICAL PROPERTIES
NORMS
DECONNECTOR
DS44-400/G Type 2 AC surge protector - 3-phase+N are connected in parallel on the AC network and must be equipped with external fuses for short-circuit current protection
Further information can be found in IEC 61643-12 standard (selection and application principles for low voltage SPD).